问代码:
RAMDirectory dir = new RAMDirectory();
public static IndexReader indexReader;
public void createIndex() {
try {
Analyzer analyzer = new StandardAnalyzer(); //分词器(有简体中文分词器)
IndexWriter indexWriter = new IndexWriter(dir, new IndexWriterConfig(analyzer));
Document doc = new Document();
Document doc1 = new Document();
Document doc2 = new Document();
Document doc3 = new Document();
FieldType fieldType = new FieldType();
fieldType.setStored(true);
doc.add(new Field("bookName", "lucene1", fieldType));
doc1.add(new Field("bookName", "lucene2", fieldType));
doc2.add(new Field("bookName", "lucene3", fieldType));
doc3.add(new Field("bookName", "lucene4", fieldType));
indexWriter.addDocument(doc);
indexWriter.addDocument(doc1);
indexWriter.addDocument(doc2);
indexWriter.addDocument(doc3);
indexWriter.close();
IndexReader reader = DirectoryReader.open(dir);
for (int i = 0; i < reader.numDocs(); i++) {
System.out.println(reader.document(i).toString());
}
IndexSearcher searcher = new IndexSearcher(reader);
QueryParser parser = new QueryParser("bookName", analyzer);
Query query = parser.parse("lucene");
TopDocs docs = searcher.search(query, 100);
System.out.println("hit : " + docs.totalHits);
} catch (IOException | ParseException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
CreateRAMIndex s = new CreateRAMIndex();
s.createIndex();
}
} ```
但是为什么我使用其他的 Query 就可以比如 FuzzyQuery 就可以。网上资料都查看的差不多了,没什么作用,大部分都是好老的版本了。。Demo 也看了。都一样的啊 为什么我这个就查询不到一点东西呢?